Improvement in automatic gates



W. A. BAKER.

AUTOMATIC GATE. No.175,3Z4. Patented March 28,1876

WITNESSES BY ATTORNEYS.

N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON. I) c.

LJNITED STATES PATENT OFFICE.

WILLIAM A. BAKER, OF MORENOI, MICHIGAN.

IMPROVEMENT m AUTOMATIC GATES.

Specification forming part of Letters Patent No. 175,324, dated March 28, 1876; application filed December 27, 1875.

To all whom it may concern Be it known that I, WILLIAM ALLEN BA- KER, of Morenci, in the county of Len-awee and State of Michigan, have invented a new and useful Improvement in Revolving Gate, of which the following is a specification Figure 1 is a top view of my improved gate. Fig. 2 is a front view of the gate. Fig. 3 is a detail view, showing the position of the revolving mechanism when the gate is latched. Fig. 4 is a detail vertical section of the gate taken through the unlatching-board.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved gate which shall be so constructed that it may beopened and closed without its being necessary for the driver to get out of the vehicle, which will occupy no space outside of the line of the fence, which shall have its operating mechanism raised from the ground so as not to be affected by snow and frozen ground, which will close directly behind the vehicle, which shall have no hinges to break, shall not be liable to sag, and may be easily removed should a wider passage-way be required.

The invention consists of a double revolving gate, the construction and operation of which will be hereinafter fully set forth.

A is the mud-sill, which extends entirely across the roadway, and to the ends of which are attached the posts upon which the gate latches, and which are thus prevented from sagging. In a socket in the center of the mud sill A is set the post G, which should set firmly in said socket, and at the same time be capable of being raised, with the gate attached to it, out of said socket, to leave the entire roadway unobstructed. The gate D is hung at its center to the post C, so that it may be revolved upon said post. With the upper part of the gate D is rigidly connected a small bevel-gear wheel, E, through the center of which passes a rod, F, rigidly attached to the upper end of the post 0. Into the teeth of the bevel-gear wheel E mesh the teeth of a larger bevel-gear wheel, G, which revolves upon a pivot attached-to the rod F, and upon the edge of which are formed ratchet-teeth for the pawl H to take hold of. The pawl H is ivoted to the end of the short arm of the bent lever I, which is pivoted at its angle to the end of the pivot upon which the bevelgear ratchet-wheel G revolves. The long arm of the lever I has a weight, J, attached to it,

of such a size as to revolve the gate D by pressing the pawl H against the teeth of the said wheel G. To the weighted lever I J is attached one end of a cord, K, the other end of which passes over a guide-pulley, L, pivoted to the end of a cross-bar, M, rigidly attachedto the upper end of the rod F. The other end of the cord K is attached to the end of the lever N, which is pivoted to the other end of the cross-bar M.

This operating mechanism is so arranged that the descent of the weighted lever l J may revolve the gate through at least one half a revolution, and that the lever N, when the gate D is open, may stand at an angle of about forty-five degrees with the plane of the gate, so that its end may be conveniently reached and operated.

O is the latch, which extends the: entire length of the gate D, and its ends project so as to engage with the catches P, attached to the posts B. The latch 0 slides in keepers attached to the gate D, and is made in two parts, the inner ends of which are pivoted to the ends of an equal-armed lever, 0, pivoted to the gate D, so that the inward or outward movement of one part of the latch 0 may move the other part inward or outward, to unlatch or latch both ends of the gate at the same time. The parts of the latch O are forced outward to latch the gate D bya spring,

attached to said gate, and which presses against a pin attached to one part of the said latch O. The latch O is drawn inward by an inclined pin or other incline, R, which bears against a pin attached to said latch. The incline R is attached to a board, S, the lower end of which is pivoted to the gate D. The side edges and the lower part of the leverboard S are inclosed by boards T, so that it cannot be operated to unlatch the gate by cattle rubbing against it. The lever-board S is arranged at such a height that the driver can readily guide his horses or horse to cause the end of the tongue, or of one of the thills,-to strike against it and unlatch the gate, which is immediately swung open by the weighted lever I J. As the vehicle passes through the gateway the driver takes hold of the projecting end of the lever N and moves it forward until the weighted lever I J is raised to its full height and strikes the cross-bar M. As the lever N is released the weighted lever I J, by its continued descent, swings the gate closed, and stops in such a position as to again open the gate when uniatched.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of the small bevel-gear wheel E, the rod F, the large bevel-gear ratch- WILLIAM A. BAKER.

Witnesses:

JOHN F. WELGH, WILSON H. CHAPMAN. 

